diff --git a/CODEOWNERS b/CODEOWNERS
index 9d76d7e677..584632936d 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -86,7 +86,7 @@ esphome/components/cap1188/* @mreditor97
 esphome/components/captive_portal/* @OttoWinter
 esphome/components/ccs811/* @habbie
 esphome/components/cd74hc4067/* @asoehlke
-esphome/components/ch422g/* @jesterret
+esphome/components/ch422g/* @clydebarrow @jesterret
 esphome/components/climate/* @esphome/core
 esphome/components/climate_ir/* @glmnet
 esphome/components/color_temperature/* @jesserockz
diff --git a/esphome/components/ch422g/__init__.py b/esphome/components/ch422g/__init__.py
index cf8b5f65d3..6a7bace0a2 100644
--- a/esphome/components/ch422g/__init__.py
+++ b/esphome/components/ch422g/__init__.py
@@ -1,18 +1,20 @@
 from esphome import pins
 import esphome.codegen as cg
 from esphome.components import i2c
+from esphome.components.i2c import I2CBus
 import esphome.config_validation as cv
 from esphome.const import (
+    CONF_I2C_ID,
     CONF_ID,
     CONF_INPUT,
     CONF_INVERTED,
     CONF_MODE,
     CONF_NUMBER,
+    CONF_OPEN_DRAIN,
     CONF_OUTPUT,
-    CONF_RESTORE_VALUE,
 )
 
-CODEOWNERS = ["@jesterret"]
+CODEOWNERS = ["@jesterret", "@clydebarrow"]
 DEPENDENCIES = ["i2c"]
 MULTI_CONF = True
 ch422g_ns = cg.esphome_ns.namespace("ch422g")
@@ -23,29 +25,36 @@ CH422GGPIOPin = ch422g_ns.class_(
 )
 
 CONF_CH422G = "ch422g"
-CONFIG_SCHEMA = (
-    cv.Schema(
-        {
-            cv.Required(CONF_ID): cv.declare_id(CH422GComponent),
-            cv.Optional(CONF_RESTORE_VALUE, default=False): cv.boolean,
-        }
-    )
-    .extend(cv.COMPONENT_SCHEMA)
-    .extend(i2c.i2c_device_schema(0x24))
-)
+
+# Note that no address is configurable - each register in the CH422G has a dedicated i2c address
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(CONF_ID): cv.declare_id(CH422GComponent),
+        cv.GenerateID(CONF_I2C_ID): cv.use_id(I2CBus),
+    }
+).extend(cv.COMPONENT_SCHEMA)
 
 
 async def to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
-    cg.add(var.set_restore_value(config[CONF_RESTORE_VALUE]))
     await cg.register_component(var, config)
-    await i2c.register_i2c_device(var, config)
+    # Can't use register_i2c_device because there is no CONF_ADDRESS
+    parent = await cg.get_variable(config[CONF_I2C_ID])
+    cg.add(var.set_i2c_bus(parent))
+
+
+# This is used as a final validation step so that modes have been fully transformed.
+def pin_mode_check(pin_config, _):
+    if pin_config[CONF_MODE][CONF_INPUT] and pin_config[CONF_NUMBER] >= 8:
+        raise cv.Invalid("CH422G only supports input on pins 0-7")
+    if pin_config[CONF_MODE][CONF_OPEN_DRAIN] and pin_config[CONF_NUMBER] < 8:
+        raise cv.Invalid("CH422G only supports open drain output on pins 8-11")
 
 
 CH422G_PIN_SCHEMA = pins.gpio_base_schema(
     CH422GGPIOPin,
-    cv.int_range(min=0, max=7),
-    modes=[CONF_INPUT, CONF_OUTPUT],
+    cv.int_range(min=0, max=11),
+    modes=[CONF_INPUT, CONF_OUTPUT, CONF_OPEN_DRAIN],
 ).extend(
     {
         cv.Required(CONF_CH422G): cv.use_id(CH422GComponent),
@@ -53,7 +62,7 @@ CH422G_PIN_SCHEMA = pins.gpio_base_schema(
 )
 
 
-@pins.PIN_SCHEMA_REGISTRY.register(CONF_CH422G, CH422G_PIN_SCHEMA)
+@pins.PIN_SCHEMA_REGISTRY.register(CONF_CH422G, CH422G_PIN_SCHEMA, pin_mode_check)
 async def ch422g_pin_to_code(config):
     var = cg.new_Pvariable(config[CONF_ID])
     parent = await cg.get_variable(config[CONF_CH422G])
diff --git a/esphome/components/ch422g/ch422g.cpp b/esphome/components/ch422g/ch422g.cpp
index 25038991ed..0db179d99e 100644
--- a/esphome/components/ch422g/ch422g.cpp
+++ b/esphome/components/ch422g/ch422g.cpp
@@ -4,33 +4,33 @@
 namespace esphome {
 namespace ch422g {
 
-const uint8_t CH422G_REG_IN = 0x26;
-const uint8_t CH422G_REG_OUT = 0x38;
-const uint8_t OUT_REG_DEFAULT_VAL = 0xdf;
+static const uint8_t CH422G_REG_MODE = 0x24;
+static const uint8_t CH422G_MODE_OUTPUT = 0x01;      // enables output mode on 0-7
+static const uint8_t CH422G_MODE_OPEN_DRAIN = 0x04;  // enables open drain mode on 8-11
+static const uint8_t CH422G_REG_IN = 0x26;           // read reg for input bits
+static const uint8_t CH422G_REG_OUT = 0x38;          // write reg for output bits 0-7
+static const uint8_t CH422G_REG_OUT_UPPER = 0x23;    // write reg for output bits 8-11
 
 static const char *const TAG = "ch422g";
 
 void CH422GComponent::setup() {
   ESP_LOGCONFIG(TAG, "Setting up CH422G...");
-  // Test to see if device exists
-  if (!this->read_inputs_()) {
+  // set outputs before mode
+  this->write_outputs_();
+  // Set mode and check for errors
+  if (!this->set_mode_(this->mode_value_) || !this->read_inputs_()) {
     ESP_LOGE(TAG, "CH422G not detected at 0x%02X", this->address_);
     this->mark_failed();
     return;
   }
 
-  // restore defaults over whatever got saved on last boot
-  if (!this->restore_value_) {
-    this->write_output_(OUT_REG_DEFAULT_VAL);
-  }
-
-  ESP_LOGD(TAG, "Initialization complete. Warning: %d, Error: %d", this->status_has_warning(),
-           this->status_has_error());
+  ESP_LOGCONFIG(TAG, "Initialization complete. Warning: %d, Error: %d", this->status_has_warning(),
+                this->status_has_error());
 }
 
 void CH422GComponent::loop() {
   // Clear all the previously read flags.
-  this->pin_read_cache_ = 0x00;
+  this->pin_read_flags_ = 0x00;
 }
 
 void CH422GComponent::dump_config() {
@@ -41,82 +41,99 @@ void CH422GComponent::dump_config() {
   }
 }
 
-// ch422g doesn't have any flag support (needs docs?)
-void CH422GComponent::pin_mode(uint8_t pin, gpio::Flags flags) {}
+void CH422GComponent::pin_mode(uint8_t pin, gpio::Flags flags) {
+  if (pin < 8) {
+    if (flags & gpio::FLAG_OUTPUT) {
+      this->mode_value_ |= CH422G_MODE_OUTPUT;
+    }
+  } else {
+    if (flags & gpio::FLAG_OPEN_DRAIN) {
+      this->mode_value_ |= CH422G_MODE_OPEN_DRAIN;
+    }
+  }
+}
 
 bool CH422GComponent::digital_read(uint8_t pin) {
-  if (this->pin_read_cache_ == 0 || this->pin_read_cache_ & (1 << pin)) {
+  if (this->pin_read_flags_ == 0 || this->pin_read_flags_ & (1 << pin)) {
     // Read values on first access or in case it's being read again in the same loop
     this->read_inputs_();
   }
 
-  this->pin_read_cache_ |= (1 << pin);
-  return this->state_mask_ & (1 << pin);
+  this->pin_read_flags_ |= (1 << pin);
+  return (this->input_bits_ & (1 << pin)) != 0;
 }
 
 void CH422GComponent::digital_write(uint8_t pin, bool value) {
   if (value) {
-    this->write_output_(this->state_mask_ | (1 << pin));
+    this->output_bits_ |= (1 << pin);
   } else {
-    this->write_output_(this->state_mask_ & ~(1 << pin));
+    this->output_bits_ &= ~(1 << pin);
   }
+  this->write_outputs_();
 }
 
 bool CH422GComponent::read_inputs_() {
   if (this->is_failed()) {
     return false;
   }
-
-  uint8_t temp = 0;
-  if ((this->last_error_ = this->read(&temp, 1)) != esphome::i2c::ERROR_OK) {
-    this->status_set_warning(str_sprintf("read_inputs_(): I2C I/O error: %d", (int) this->last_error_).c_str());
-    return false;
+  uint8_t result;
+  // reading inputs requires the chip to be in input mode, possibly temporarily.
+  if (this->mode_value_ & CH422G_MODE_OUTPUT) {
+    this->set_mode_(this->mode_value_ & ~CH422G_MODE_OUTPUT);
+    result = this->read_reg_(CH422G_REG_IN);
+    this->set_mode_(this->mode_value_);
+  } else {
+    result = this->read_reg_(CH422G_REG_IN);
   }
-
-  uint8_t output = 0;
-  if ((this->last_error_ = this->bus_->read(CH422G_REG_IN, &output, 1)) != esphome::i2c::ERROR_OK) {
-    this->status_set_warning(str_sprintf("read_inputs_(): I2C I/O error: %d", (int) this->last_error_).c_str());
-    return false;
-  }
-
-  this->state_mask_ = output;
+  this->input_bits_ = result;
   this->status_clear_warning();
-
   return true;
 }
 
-bool CH422GComponent::write_output_(uint8_t value) {
-  const uint8_t temp = 1;
-  if ((this->last_error_ = this->write(&temp, 1, false)) != esphome::i2c::ERROR_OK) {
-    this->status_set_warning(str_sprintf("write_output_(): I2C I/O error: %d", (int) this->last_error_).c_str());
+// Write a register. Can't use the standard write_byte() method because there is no single pre-configured i2c address.
+bool CH422GComponent::write_reg_(uint8_t reg, uint8_t value) {
+  auto err = this->bus_->write(reg, &value, 1);
+  if (err != i2c::ERROR_OK) {
+    this->status_set_warning(str_sprintf("write failed for register 0x%X, error %d", reg, err).c_str());
     return false;
   }
-
-  uint8_t write_mask = value;
-  if ((this->last_error_ = this->bus_->write(CH422G_REG_OUT, &write_mask, 1)) != esphome::i2c::ERROR_OK) {
-    this->status_set_warning(
-        str_sprintf("write_output_(): I2C I/O error: %d for write_mask: %d", (int) this->last_error_, (int) write_mask)
-            .c_str());
-    return false;
-  }
-
-  this->state_mask_ = value;
   this->status_clear_warning();
   return true;
 }
 
+uint8_t CH422GComponent::read_reg_(uint8_t reg) {
+  uint8_t value;
+  auto err = this->bus_->read(reg, &value, 1);
+  if (err != i2c::ERROR_OK) {
+    this->status_set_warning(str_sprintf("read failed for register 0x%X, error %d", reg, err).c_str());
+    return 0;
+  }
+  this->status_clear_warning();
+  return value;
+}
+
+bool CH422GComponent::set_mode_(uint8_t mode) { return this->write_reg_(CH422G_REG_MODE, mode); }
+
+bool CH422GComponent::write_outputs_() {
+  return this->write_reg_(CH422G_REG_OUT, static_cast<uint8_t>(this->output_bits_)) &&
+         this->write_reg_(CH422G_REG_OUT_UPPER, static_cast<uint8_t>(this->output_bits_ >> 8));
+}
+
 float CH422GComponent::get_setup_priority() const { return setup_priority::IO; }
 
 // Run our loop() method very early in the loop, so that we cache read values
 // before other components call our digital_read() method.
 float CH422GComponent::get_loop_priority() const { return 9.0f; }  // Just after WIFI
 
-void CH422GGPIOPin::setup() { pin_mode(flags_); }
 void CH422GGPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
-bool CH422GGPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
+bool CH422GGPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) ^ this->inverted_; }
 
-void CH422GGPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
+void CH422GGPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value ^ this->inverted_); }
 std::string CH422GGPIOPin::dump_summary() const { return str_sprintf("EXIO%u via CH422G", pin_); }
+void CH422GGPIOPin::set_flags(gpio::Flags flags) {
+  flags_ = flags;
+  this->parent_->pin_mode(this->pin_, flags);
+}
 
 }  // namespace ch422g
 }  // namespace esphome
diff --git a/esphome/components/ch422g/ch422g.h b/esphome/components/ch422g/ch422g.h
index 781df65437..30780e09ad 100644
--- a/esphome/components/ch422g/ch422g.h
+++ b/esphome/components/ch422g/ch422g.h
@@ -23,32 +23,30 @@ class CH422GComponent : public Component, public i2c::I2CDevice {
   void pin_mode(uint8_t pin, gpio::Flags flags);
 
   float get_setup_priority() const override;
-
   float get_loop_priority() const override;
-
   void dump_config() override;
 
-  void set_restore_value(bool restore_value) { this->restore_value_ = restore_value; }
-
  protected:
+  bool write_reg_(uint8_t reg, uint8_t value);
+  uint8_t read_reg_(uint8_t reg);
+  bool set_mode_(uint8_t mode);
   bool read_inputs_();
-
-  bool write_output_(uint8_t value);
+  bool write_outputs_();
 
   /// The mask to write as output state - 1 means HIGH, 0 means LOW
-  uint8_t state_mask_{0x00};
+  uint16_t output_bits_{0x00};
   /// Flags to check if read previously during this loop
-  uint8_t pin_read_cache_ = {0x00};
-  /// Storage for last I2C error seen
-  esphome::i2c::ErrorCode last_error_;
-  /// Whether we want to override stored values on expander
-  bool restore_value_{false};
+  uint8_t pin_read_flags_ = {0x00};
+  /// Copy of last read values
+  uint8_t input_bits_ = {0x00};
+  /// Copy of the mode value
+  uint8_t mode_value_{};
 };
 
-/// Helper class to expose a CH422G pin as an internal input GPIO pin.
+/// Helper class to expose a CH422G pin as a GPIO pin.
 class CH422GGPIOPin : public GPIOPin {
  public:
-  void setup() override;
+  void setup() override{};
   void pin_mode(gpio::Flags flags) override;
   bool digital_read() override;
   void digital_write(bool value) override;
@@ -57,13 +55,13 @@ class CH422GGPIOPin : public GPIOPin {
   void set_parent(CH422GComponent *parent) { parent_ = parent; }
   void set_pin(uint8_t pin) { pin_ = pin; }
   void set_inverted(bool inverted) { inverted_ = inverted; }
-  void set_flags(gpio::Flags flags) { flags_ = flags; }
+  void set_flags(gpio::Flags flags);
 
  protected:
-  CH422GComponent *parent_;
-  uint8_t pin_;
-  bool inverted_;
-  gpio::Flags flags_;
+  CH422GComponent *parent_{};
+  uint8_t pin_{};
+  bool inverted_{};
+  gpio::Flags flags_{};
 };
 
 }  // namespace ch422g
diff --git a/esphome/components/mqtt/__init__.py b/esphome/components/mqtt/__init__.py
index 240b407819..336d928f71 100644
--- a/esphome/components/mqtt/__init__.py
+++ b/esphome/components/mqtt/__init__.py
@@ -11,6 +11,7 @@ from esphome.const import (
     CONF_BIRTH_MESSAGE,
     CONF_BROKER,
     CONF_CERTIFICATE_AUTHORITY,
+    CONF_CLEAN_SESSION,
     CONF_CLIENT_CERTIFICATE,
     CONF_CLIENT_CERTIFICATE_KEY,
     CONF_CLIENT_ID,
@@ -209,6 +210,7 @@ CONFIG_SCHEMA = cv.All(
             cv.Optional(CONF_PORT, default=1883): cv.port,
             cv.Optional(CONF_USERNAME, default=""): cv.string,
             cv.Optional(CONF_PASSWORD, default=""): cv.string,
+            cv.Optional(CONF_CLEAN_SESSION, default=False): cv.boolean,
             cv.Optional(CONF_CLIENT_ID): cv.string,
             cv.SplitDefault(CONF_IDF_SEND_ASYNC, esp32_idf=False): cv.All(
                 cv.boolean, cv.only_with_esp_idf
@@ -325,6 +327,7 @@ async def to_code(config):
     cg.add(var.set_broker_port(config[CONF_PORT]))
     cg.add(var.set_username(config[CONF_USERNAME]))
     cg.add(var.set_password(config[CONF_PASSWORD]))
+    cg.add(var.set_clean_session(config[CONF_CLEAN_SESSION]))
     if CONF_CLIENT_ID in config:
         cg.add(var.set_client_id(config[CONF_CLIENT_ID]))
 
diff --git a/esphome/components/mqtt/mqtt_client.cpp b/esphome/components/mqtt/mqtt_client.cpp
index c19b24c0cf..b5ac285026 100644
--- a/esphome/components/mqtt/mqtt_client.cpp
+++ b/esphome/components/mqtt/mqtt_client.cpp
@@ -147,6 +147,7 @@ void MQTTClientComponent::dump_config() {
                 this->ip_.str().c_str());
   ESP_LOGCONFIG(TAG, "  Username: " LOG_SECRET("'%s'"), this->credentials_.username.c_str());
   ESP_LOGCONFIG(TAG, "  Client ID: " LOG_SECRET("'%s'"), this->credentials_.client_id.c_str());
+  ESP_LOGCONFIG(TAG, "  Clean Session: %s", YESNO(this->credentials_.clean_session));
   if (this->is_discovery_ip_enabled()) {
     ESP_LOGCONFIG(TAG, "  Discovery IP enabled");
   }
@@ -246,6 +247,7 @@ void MQTTClientComponent::start_connect_() {
   this->mqtt_backend_.disconnect();
 
   this->mqtt_backend_.set_client_id(this->credentials_.client_id.c_str());
+  this->mqtt_backend_.set_clean_session(this->credentials_.clean_session);
   const char *username = nullptr;
   if (!this->credentials_.username.empty())
     username = this->credentials_.username.c_str();
diff --git a/esphome/components/mqtt/mqtt_client.h b/esphome/components/mqtt/mqtt_client.h
index b0d3bbe66d..887800f201 100644
--- a/esphome/components/mqtt/mqtt_client.h
+++ b/esphome/components/mqtt/mqtt_client.h
@@ -51,6 +51,7 @@ struct MQTTCredentials {
   std::string username;
   std::string password;
   std::string client_id;  ///< The client ID. Will automatically be truncated to 23 characters.
+  bool clean_session;     ///< Whether the session will be cleaned or remembered between connects.
 };
 
 /// Simple data struct for Home Assistant component availability.
@@ -254,6 +255,7 @@ class MQTTClientComponent : public Component {
   void set_username(const std::string &username) { this->credentials_.username = username; }
   void set_password(const std::string &password) { this->credentials_.password = password; }
   void set_client_id(const std::string &client_id) { this->credentials_.client_id = client_id; }
+  void set_clean_session(const bool &clean_session) { this->credentials_.clean_session = clean_session; }
   void set_on_connect(mqtt_on_connect_callback_t &&callback);
   void set_on_disconnect(mqtt_on_disconnect_callback_t &&callback);
 
diff --git a/esphome/components/wifi/wifi_component_esp_idf.cpp b/esphome/components/wifi/wifi_component_esp_idf.cpp
index 6008acb95d..c430d160f2 100644
--- a/esphome/components/wifi/wifi_component_esp_idf.cpp
+++ b/esphome/components/wifi/wifi_component_esp_idf.cpp
@@ -130,11 +130,16 @@ void event_handler(void *arg, esp_event_base_t event_base, int32_t event_id, voi
 }
 
 void WiFiComponent::wifi_pre_setup_() {
-#ifdef USE_ESP32_IGNORE_EFUSE_MAC_CRC
   uint8_t mac[6];
+#ifdef USE_ESP32_IGNORE_EFUSE_MAC_CRC
   get_mac_address_raw(mac);
   set_mac_address(mac);
   ESP_LOGV(TAG, "Use EFuse MAC without checking CRC: %s", get_mac_address_pretty().c_str());
+#else
+  if (has_custom_mac_address()) {
+    get_mac_address_raw(mac);
+    set_mac_address(mac);
+  }
 #endif
   esp_err_t err = esp_netif_init();
   if (err != ERR_OK) {
diff --git a/esphome/const.py b/esphome/const.py
index 6e7bbdec98..40b7a1c419 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -120,6 +120,7 @@ CONF_CHANNELS = "channels"
 CONF_CHARACTERISTIC_UUID = "characteristic_uuid"
 CONF_CHECK = "check"
 CONF_CHIPSET = "chipset"
+CONF_CLEAN_SESSION = "clean_session"
 CONF_CLEAR_IMPEDANCE = "clear_impedance"
 CONF_CLIENT_CERTIFICATE = "client_certificate"
 CONF_CLIENT_CERTIFICATE_KEY = "client_certificate_key"
diff --git a/esphome/core/helpers.cpp b/esphome/core/helpers.cpp
index e75b06ccd3..2e99b0df70 100644
--- a/esphome/core/helpers.cpp
+++ b/esphome/core/helpers.cpp
@@ -671,9 +671,17 @@ void get_mac_address_raw(uint8_t *mac) {  // NOLINT(readability-non-const-parame
   // match the CRC that goes along with it. For those devices, this
   // work-around reads and uses the MAC address as-is from EFuse,
   // without doing the CRC check.
-  esp_efuse_read_field_blob(ESP_EFUSE_MAC_FACTORY, mac, 48);
+  if (has_custom_mac_address()) {
+    esp_efuse_read_field_blob(ESP_EFUSE_MAC_CUSTOM, mac, 48);
+  } else {
+    esp_efuse_read_field_blob(ESP_EFUSE_MAC_FACTORY, mac, 48);
+  }
 #else
-  esp_efuse_mac_get_default(mac);
+  if (has_custom_mac_address()) {
+    esp_efuse_mac_get_custom(mac);
+  } else {
+    esp_efuse_mac_get_default(mac);
+  }
 #endif
 #elif defined(USE_ESP8266)
   wifi_get_macaddr(STATION_IF, mac);
@@ -685,20 +693,53 @@ void get_mac_address_raw(uint8_t *mac) {  // NOLINT(readability-non-const-parame
 // this should be an error, but that messes with CI checks. #error No mac address method defined
 #endif
 }
+
 std::string get_mac_address() {
   uint8_t mac[6];
   get_mac_address_raw(mac);
   return str_snprintf("%02x%02x%02x%02x%02x%02x", 12, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 }
+
 std::string get_mac_address_pretty() {
   uint8_t mac[6];
   get_mac_address_raw(mac);
   return str_snprintf("%02X:%02X:%02X:%02X:%02X:%02X", 17, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
 }
+
 #ifdef USE_ESP32
 void set_mac_address(uint8_t *mac) { esp_base_mac_addr_set(mac); }
 #endif
 
+bool has_custom_mac_address() {
+#ifdef USE_ESP32
+  uint8_t mac[6];
+#if defined(CONFIG_SOC_IEEE802154_SUPPORTED) || defined(USE_ESP32_IGNORE_EFUSE_MAC_CRC)
+  return (esp_efuse_read_field_blob(ESP_EFUSE_MAC_CUSTOM, mac, 48) == ESP_OK) && mac_address_is_valid(mac);
+#else
+  return (esp_efuse_mac_get_custom(mac) == ESP_OK) && mac_address_is_valid(mac);
+#endif
+#else
+  return false;
+#endif
+}
+
+bool mac_address_is_valid(const uint8_t *mac) {
+  bool is_all_zeros = true;
+  bool is_all_ones = true;
+
+  for (uint8_t i = 0; i < 6; i++) {
+    if (mac[i] != 0) {
+      is_all_zeros = false;
+    }
+  }
+  for (uint8_t i = 0; i < 6; i++) {
+    if (mac[i] != 0xFF) {
+      is_all_ones = false;
+    }
+  }
+  return !(is_all_zeros || is_all_ones);
+}
+
 void delay_microseconds_safe(uint32_t us) {  // avoids CPU locks that could trigger WDT or affect WiFi/BT stability
   uint32_t start = micros();
 
diff --git a/esphome/core/helpers.h b/esphome/core/helpers.h
index 3e6fe9433e..7df4b84230 100644
--- a/esphome/core/helpers.h
+++ b/esphome/core/helpers.h
@@ -635,6 +635,14 @@ std::string get_mac_address_pretty();
 void set_mac_address(uint8_t *mac);
 #endif
 
+/// Check if a custom MAC address is set (ESP32 & variants)
+/// @return True if a custom MAC address is set (ESP32 & variants), else false
+bool has_custom_mac_address();
+
+/// Check if the MAC address is not all zeros or all ones
+/// @return True if MAC is valid, else false
+bool mac_address_is_valid(const uint8_t *mac);
+
 /// Delay for the given amount of microseconds, possibly yielding to other processes during the wait.
 void delay_microseconds_safe(uint32_t us);
 
diff --git a/esphome/core/ring_buffer.cpp b/esphome/core/ring_buffer.cpp
index d8ca831de0..f97c686684 100644
--- a/esphome/core/ring_buffer.cpp
+++ b/esphome/core/ring_buffer.cpp
@@ -11,16 +11,26 @@ namespace esphome {
 
 static const char *const TAG = "ring_buffer";
 
+RingBuffer::~RingBuffer() {
+  if (this->handle_ != nullptr) {
+    vStreamBufferDelete(this->handle_);
+    ExternalRAMAllocator<uint8_t> allocator(ExternalRAMAllocator<uint8_t>::ALLOW_FAILURE);
+    allocator.deallocate(this->storage_, this->size_);
+  }
+}
+
 std::unique_ptr<RingBuffer> RingBuffer::create(size_t len) {
   std::unique_ptr<RingBuffer> rb = make_unique<RingBuffer>();
 
+  rb->size_ = len + 1;
+
   ExternalRAMAllocator<uint8_t> allocator(ExternalRAMAllocator<uint8_t>::ALLOW_FAILURE);
-  rb->storage_ = allocator.allocate(len + 1);
+  rb->storage_ = allocator.allocate(rb->size_);
   if (rb->storage_ == nullptr) {
     return nullptr;
   }
 
-  rb->handle_ = xStreamBufferCreateStatic(len + 1, 1, rb->storage_, &rb->structure_);
+  rb->handle_ = xStreamBufferCreateStatic(rb->size_, 1, rb->storage_, &rb->structure_);
   ESP_LOGD(TAG, "Created ring buffer with size %u", len);
   return rb;
 }
diff --git a/esphome/core/ring_buffer.h b/esphome/core/ring_buffer.h
index 97ffefcefa..c0511fb52e 100644
--- a/esphome/core/ring_buffer.h
+++ b/esphome/core/ring_buffer.h
@@ -12,6 +12,8 @@ namespace esphome {
 
 class RingBuffer {
  public:
+  ~RingBuffer();
+
   /**
    * @brief Reads from the ring buffer, waiting up to a specified number of ticks if necessary.
    *
@@ -83,6 +85,7 @@ class RingBuffer {
   StreamBufferHandle_t handle_;
   StaticStreamBuffer_t structure_;
   uint8_t *storage_;
+  size_t size_{0};
 };
 
 }  // namespace esphome
diff --git a/esphome/voluptuous_schema.py b/esphome/voluptuous_schema.py
index 7f1573b443..15f9206f21 100644
--- a/esphome/voluptuous_schema.py
+++ b/esphome/voluptuous_schema.py
@@ -226,4 +226,6 @@ class _Schema(vol.Schema):
         if isinstance(schema, vol.Schema):
             schema = schema.schema
         ret = super().extend(schema, extra=extra)
-        return _Schema(ret.schema, extra=ret.extra, extra_schemas=self._extra_schemas)
+        return _Schema(
+            ret.schema, extra=ret.extra, extra_schemas=self._extra_schemas.copy()
+        )
diff --git a/tests/components/ch422g/common.yaml b/tests/components/ch422g/common.yaml
index 02061bda59..d65956ecac 100644
--- a/tests/components/ch422g/common.yaml
+++ b/tests/components/ch422g/common.yaml
@@ -1,6 +1,5 @@
 ch422g:
   - id: ch422g_hub
-    address: 0x24
 
 binary_sensor:
   - platform: gpio
@@ -11,10 +10,18 @@ binary_sensor:
       number: 1
       mode: INPUT
       inverted: true
+output:
   - platform: gpio
-    id: ch422g_output
+    id: ch422_out_0
     pin:
       ch422g: ch422g_hub
       number: 0
       mode: OUTPUT
       inverted: false
+  - platform: gpio
+    id: ch422_out_11
+    pin:
+      ch422g: ch422g_hub
+      number: 11
+      mode: OUTPUT_OPEN_DRAIN
+      inverted: true
diff --git a/tests/components/mqtt/common.yaml b/tests/components/mqtt/common.yaml
index b7d1655ec9..f7a727ab2f 100644
--- a/tests/components/mqtt/common.yaml
+++ b/tests/components/mqtt/common.yaml
@@ -10,6 +10,7 @@ mqtt:
   port: 1883
   username: debug
   password: debug
+  clean_session: True
   client_id: someclient
   use_abbreviations: false
   discovery: true